Vibration test and analysis of mini-tiller

Li Guo, Chen Jian, Xie Hangjia, Wang Shimeng

Abstract


Intense vibration happens at the handle of the mini-tillers that abundantly used in mountainous and hilly areas of southwest China. It is absolutely essential to probe into the vibration characteristics and factors why handle of the tiller vibrates violently. Therefore, the vibration acceleration signals of a mini-tiller’s handle and engine cover were tested under the following four conditions: the engine being idle, racing at medium and high speeds, and the tiller working in the field with high engine speed. The signals were processed by means of the time domain eigenvalue analysis and the frequency spectrum analysis. The results showed that when the tiller was under static condition, with increase of the engine speed, the handle vibration decreased in the vertical direction, increased in the fore-and-aft direction and had marginal changes in the left-to-right direction. When the tiller worked at high engine speed, the handle vibrated most violently in the fore-and-aft direction, while the vibrations at the engine cover and handle decreased substantially in each direction, compared with the static conditions. Rotary blades cutting soil increased the damping of the whole machine so as to reduce the vibration at the handle and the engine cover, but the handle vibration was still violent. When the tiller worked, that soil absorbing energies of some frequencies led to the first order unbalanced inertia force of the engine becoming the main reason why handle vibrated intensely.
Keywords: mini-tiller, vibration test, time domain analysis, frequency domain analysis
DOI: 10.3965/j.ijabe.20160903.1979

Citation: Li G, Chen J, Xie H J, Wang S M. Vibration test and analysis of mini-tiller. Int J Agric & Biol Eng, 2016; 9(3): 97-103.

Keywords


mini-tiller, vibration test, time domain analysis, frequency domain analysis

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References


Chen J, Chen C, Chen H. Three new challenges micro tillers face in southwest China and study of countermeasures. Journal of Agricultural Mechanization Research, 2014; 10: 245–248. (in Chinese with English abstract)

Ragni L, Vassalini G, Xu F, Zhang L B. Vibration and noise of small implements for soil tillage. J. Agric. Engng Res, 1999; 74(4): 403–409.

Zhu C L, Cheng Z S, Wang H Y, Liu J L. Study on the header vibration of a combine. Transactions of the CSAM, 2004; 35(4): 59–65. (in Chinese with English abstract)

Dong X Q, Song J N, Wang J C, Li Y L, Zhang J K. Vibration frequency optimization and movement characteristics analysis of vibration shovel for meadow. Transactions of the CSAE, 2012; 28(12): 44–49. (in Chinese with English abstract)

Zhang L B, Jiang F, Wang Y, Zhang X. Measurement and analysis of vibration of small agricultural machinery based on LMS Test. Lab. Transactions of the CSAE, 2008; 24(5):

–104. (in Chinese with English abstract)

Zhang X M. Analysis of vibration test on engine of a wheeled tractor. Transactions of the CSAM, 2000; 31(6): 69–71. (in Chinese with English abstract)

Xu L Z, Li Y M, Sun P P, Pang J. Vibration measurement and analysis of tracked-whole feeding rice combine harvester. Transactions of the CSAE, 2014; 30(8): 49–55. (in Chinese with English abstract)

Zhu S H, Xu G, Yuan J Q, Ma J F, Yi L, Li K. Influence of implement’s mass on vibration characteristics of tractor-implement system. Transactions of the CSAE, 2014; 30(24): 30–37. (in Chinese with English abstract)

Ding Y, Guo J G, Xu J Q. Human-tractor system vibration analysis system based on web technology. Transactions of the CSAE, 2003; 19(2): 117–120. (in Chinese with English abstract)

Wang F E, Cao X H, Guo W J, Ma G J, He C X. Research on vibration strength and frequency structure of main driver seat of the wheat combine. Transactions of the CSAM, 2007; 38(4): 62–65. (in Chinese with English abstract)

Rabbani M A, Tsujimoto T, Mitsuoka M, Inoueb E, Okayasub T. Prediction of the vibration characteristics of half-track tractor considering a three-dimensional dynamic model. Biosystem Engineering, 2011; 110(2): 178–188.

Bini S, Kathirvel K. Vibration characteristics of walking and riding type power tillers. Biosystems Engineering, 2006; 95(4): 517–528.

Xu G, Zhu S H, Nie X T, He L, Li K. Natural frequencies calculation for vibrating systems of tractors made in China. Journal of Vibration and Shock, 2014; 33(15): 157–161. (In Chinese with English abstract)

Thomas H L, Morten K E, Ario K. Experimental analysis of occupational whole-body vibration exposure of agricultural tractor with large square baler. International Journal of Industrial Ergonomics, 2015; 47: 79–83.

Paolo L, Roberto D, Christian P, Angela C. A round robin test for the hand-transmitted vibration from an olive harvester. International Journal of Industrial Ergonomics, 2016; 53: 86–92.

Federica C, Margherita M C, Christian P, Eugenio C. Ergonomic analysis of the effects of a telehandler’s active suspended cab on whole body vibration level and operator comfort. International Journal of Industrial Ergonomics, 2016; 53: 19–26.

Thomas H L, Thorkil K I, Niels K A, Ole Ø M, Michael R H. Reducing whole-body vibration exposure in backhoe loaders by education of operators. International Journal of Industrial Ergonomics, 2012; 42: 304–311.

Ahmed O B, Goupillon J F. Predicting the ride vibration of an agricultural tractor. Journal of Terramechanics, 1997; 34(1): 1–11.

Bulent C, Turker S, Fazilet N A, Cengiz O. Vibration and noise characteristics of flap type olive harvesters. Applied Ergonomics, 2011; 42: 397–402.

Ramakrishnan M, Stephan M, John S. The effect of occupational whole-body vibration on standing balance: A systematic review. International Journal of Industrial Ergonomics, 2010; 40: 698–709.

Servadio P, Marsili A, Belfiore N P. Analysis of driving seat vibrations in high forward speed tractors. Power and Machinery, 2007; 97: 171–180.

Yang J, Meng X W. Study on vibration mechanism and measures for vibration reducing to the handle of cultivator by virtual prototype technology. Transactions of the CSAM, 2005; 36(2): 39–42. (in Chinese with English abstract)

Tewari V K, Dewangan K N, Karmakar S. Operator's fatigue in field operation of hand tractors. Biosystems Engineering, 2004; 89(1): 1–11.

Dewangan K N, Tewari V K. Vibration energy absorption in the hand-arm system of hand tractor operator. Biosystems Engineering, 2009; 103(4): 445–454.

Tewari V K, Dewangan K N. Effect of vibration isolators inreduction of workstress during field operation of hand tractor. Biosystems Engineering, 2009; 103(4): 146–158.

Kalra M, Rakheja S, Marcotte P, Dewangan K N, Adewusi S. Measurement of coupling forces at the power tool handle-hand interface. International Journal of Industrial Ergonomics, 2015; 50: 105–120.

Ko Y H, Ooi L E, Zaidi M R. The design and development of suspended handles for reducing hand-arm vibration in petrol driven grass trimmer. International Journal of Industrial Ergonomics, 2011; 41: 459–470.

Adewusi S, Rakheja S, Marcotte P, Thomas M. Distributed vibration power absorption of the human hand-arm system in different postures coupled with vibrating handle and power tools. International Journal of Industrial Ergonomics, 2013; 43: 363–374.

Rao S S. Mechanical vibration (The fourth edition). Translated by Li X Y and Zhang M L. Beijing: Tsinghua University Press, 2009.

ISO 5349 (1986). Mechanical vibration. Guidelines for the measurement and the assessment of human exposure to hand-transmitted vibration.

Liu Z, Wang J X, Shuai S J. The principle of automobile engine. Beijing: Tsinghua University Press, 2011.




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